There are many PNG fix solutions available, but none of them work for me like Drew McLellan's SuperSleight, which is the basis of this plugin.

Since none of the PNG fixes are 100% efficient and are known to mess up regular non-transparent background PNGs used in certain templates, this plugin can either process only inline or inline and background images, depending on your needs and/or the template you intend to use. For more info, visit http://24ways.org/2007/supersleight-transparent-png-in-ie6/ or http://www.edgeofmyseat.com/